Wallboard



Patented Sept. 15, 1936 UNITED STATES PATENT OFFICE,

WALLBOARD Kenneth w. nahen, Short mm, is. .1. Application August 11,"1934, Serial No. mm

2 Claims. (01. 72-16) This invention has to do with particular methodsof manufacturing and using wallboard and by the term -wallboard, I meansthe boards or composition sheets that are now manufactured and that areused as a substitute for plaster and' lath or other sealing means on theinner walls of rooms.

The use of wallboard has increased tremendously because of theconvenience of its use, because of the cheapness of manufacture andprobably most of all, because of the saving in time and labor over theformer method of sealing, that is .the application of lath and laterplaster.

One of the objections to the use of wallboard is that the known boardscannot be applied in such a manner that the cracks or lines of divisionbetween the several boards are not plainly discernible. Sometimes theselines are covered by means of additional strips placed over the cracksbut these additional strips, adding to the thickness, are of themselvesplainly evident and, while the crack is closed, the mark of joining isby no means obliterated.

The object of this invention, then, is to provide a wallboard soconstructed that the line of juncture between two or more boardsdisappears and I accomplish this by several different means, all ofwhich will be described as the specification progresses.

Another advantage of my construction resides in the fact that the jointsbetween the boards are strengthened and that the joints actuallydisappear to suchan extent that the board may be painted without firstbeing covered with plaster or otherwise and that wall paper may beapplied directly to the board without the irregularities due to cracksor to the fillers formerly used in an attempt to cover the cracks.

Another object of my invention is to overcome the necessity for pointingup the board where the nails have been inserted. That is, in filling'the depressions made by the nail heads or by the hammer used in drivingthe nails and this is important, not only because of the saving of timebut because of the appearance, the-pointing up seldom being done soskillfully that it is not evident even through paint or wall paper.

The following is what I consider the best means of carrying out myinvention and the accompanying drawing should be referred to for acomplete understanding of the specification which follows.

The figures are all in section.

portion in position.

, board are covered with Fig. 1 shows two parts of board with the jointclosing means raised. Fig. 2 shows this Similar reference numeralsindicate like parts in all the figures where they appear.

The wallboard to which I refer is made of different materials, one ofthe most common type is what is called a gypsum board, wherein the'innerportion as shown at I 3 is formed of gypsum and other materials, some ofwhich may be fibrous materials but as the gypsum and the fibrousmaterial is apt to .disintegrate and has no particular strength initself, both sides of this paper, cardboard or any other suitablematerial. The back or inner face is covered with material which isusually a heavy paper and this is indicated at I 4. The front is oftencovered with heavy paper or even with laminated wood or other material.The front cover or liner is indicated at I5. I

This board has a complete inner liner as shown at I 4 and also acomplete outer liner as shown at IE but secured over the liner orcovering member 15 is a second covering member l6 which, in thisinstance, will probably be a veneer and possibly a wood veneer. In thisconstruction, the veneer or outer exposed portion while extending fromone edge of the board as indicated at II will not reach the oppositeedge of the board and a. portion of the inner liner member l will beexposed as indicated at I 8. As shown in Fig. 2, this projected portionI! will also be sealed upon the members l5 and I8 to cover the dividingline IS.

The means for securing this board in operable position are not shown butthey may be any suitpart with the joint closing able means, but whateverthe means may be, such securing means should be placed under the flap orextending portion l1, and before this member is sealed into place, andeven though I have described means for concealing the line of juncturebetween associated wall boards, it is desirable that when placed inposition the edges of the boards be brought closely together and beforethe projection I1 is sealed into position so that roughened or brokenedges of associated boards will be completely covered and anyirregularities resulting therefrom. will be obliterated by the flap orprojecting member I].

Of course it will be understood that still further modifications may bemade within the scope of the appended claims without departing from theprinciple or sacrificing the advantages of this invention.

1. A wallboard joint having a. dummy.

liners on one surface thereof one of said liners extending to a. pointless than the full width at oneedge thereoisnd greater than the fullwidth of the board'at the other edge thereof, the said projectingportion being secured on the uncovered portion or the next adjacentboard and to be se-. cured thereto to cover the junction between sd-.jacent boards and a third liner or reinforcingflieetu'rangedonthesuriaceoftheboardopposite to the first mentionedsurface.

2. 'A' wallboatd joint inner liner extending across the entire innersurface of the board and secured thereto and an outer liner extendingless than the entire width of the board and secured to the inner linerand a member of a. thickness equal to the outer liner and secured to theinner liner and to project from the edge thereof to be secured tothelnner liner of the 10

